Zones at High Elevation

I live in a high elevation, and I have noticed that I have a hard time getting some of the herbs to grow. In your catalogue you have given the zones for the different herbs, but where is the chart to compare it to?

There are zone maps in the "Richters InfoCentre" section of our website at www.richters.com. Although it is sometimes difficult to identify the correct zone from these maps for mountainous areas, the temperature ranges for each zone are listed and they help to decide which is the correct one for your garden or farm.